Very odd exim ratelimit problems

[evil_smurf]

Scenario:

2 computers, A and B

A's email address = [email protected]
B's email address = [email protected]

Both are setup to correctly SMTP AUTH using their respective email accounts.
Both are in Texas and Georgia, respectively.

exim rate limit settings:

defer message = Sorry, too fast.
ratelimit = 3 / 1h / per_rcpt / $authenticated_id


The problem? If Computer A sends 4 messages (or a message with 4 recipients) and gets rate limited, Computer B, that is very far away, has a separate email account all together, and a different IP address, also gets rate limited! Computer B cannot send an email at all.

I think for some reason exim is limiting the entire domain, but it is not supposed to act that way. Why is it doing that, and more importantly, how can I stop it from doing that? I want it to limit per email address, not the entire domain.

I have tried with and without the $authenticated_id key. It doesn't seem to make a difference.

Here are the Exim logs showing the rejections:

2008-04-04 23:55:28 H=localhost ([192.168.1.7]) [127.0.0.1] F=[3]<[email protected]> temporarily rejected RCPT [4]<[email protected]>:
2008-04-04 23:55:35 H=localhost ([192.168.1.2]) [127.0.0.1] F=[5]<[email protected]> temporarily rejected RCPT [6]<[email protected]>:

2008-04-04 23:55:36 H=localhost ([192.168.1.7]) [127.0.0.1] incomplete transaction (QUIT) from [7]<[email protected]>
2008-04-04 23:55:37 H=localhost ([192.168.1.2]) [127.0.0.1] incomplete transaction (QUIT) from [8]<[email protected]>